8429946-8429943-8429961-8429964-8429967-8429940

Component Location

General Description

The Air mix actuator(Temperature actuator) located at heater unit. It contains temp motor that changes temp door position and potentiometer that monitors position of temp door. The Air mix actuator(Temperature actuator) regulates the temperature by the procedure as follows. Signal from control unit adjusts position of temp door by operating temp motor and then temperature will be regulated by the hot/cold air ratio decided by position of temp door. In operation, potentiometer delivers temp door position transformed into voltage value to A/C ECU .

DTC Description

Air conditioner Control Module sets DTC B1246 if Feedback signal of Driver Air mix actuator(Temperature actuator) has been detected over 4.9V for 100ms.

DTC Detecting Condition

Item	Detecting Condition	Possible Cause
DTC Strategy	• Voltage check	1. Short to battery in signal circuit(Feedback signal) 2. Faulty Driver temperature Actuator 3. Air conditioner Control Module
Enable Conditions	• IG KEY ON
Threshold value	• Feedback signal of Driver Air mix actuator(Temperature actuator) has been detected over 4.9V for 100ms.
Failsafe	• Setting temperature : 17℃(63℉)-24℃(76.1℉), fix at max. cooling position • Setting temperature : 25℃(77℉)-32℃(89.6℉), fix at max. heating position

Specification

※ Voltage value of Air Mix potentiometer as a function of temp door position.

Door position	Voltage
Max. cool	0.4 V±0.3V
Max. warm	4.6 V±0.3V

Diagnostic Circuit Diagram

note

To view Flash content, you need to install the appropriate browser extension